PENTAXDUIA. DIGYNIA. 181 



Leafes ternate; (involucellum in /. ostruthium 1 or 2- 

 leaved, minute.) 



Species. 1. 1. lucida. Sp. Angelica lucida. L. Selimon 

 tanadeiise? Mich. 



The plant quite smooth, and scarcely inferior in size 

 to Heracleum SphoiuhjUum. Leaves primarily 3-parted, 

 and decompound, the segments confluent in o's, of which 

 the more complete are ohlong-ovate, acute, mucronately 

 and deeply sen-ate; sheaths remarkably large and ventri- 

 cose, towards the summit of the stem nothing- is produced 

 but these large and membranaceous sheaths, and no 

 other kind of involucrum; the flowering umbell consist- 

 ing of many rays is so dense as to appear nearly he- 

 mispherical; partial involucrum minute and setaceous; 

 flowers white and regular; with the seed I am unac- 

 (juainted; advanced germ truncated, roundish, somewhat 

 gibbous and compressed, slightly striated. Whether^this 

 be vSprengel's plant or not, J 'have not the means of 

 ascertaining, being unacquainted with the mature fruit, 

 in the absence of which the definition becomes an insol- 

 vable riddle. 



A genus now, according to Sprengel, including 6 spe- 

 cies, chiefly separated from Angelica and Selinum. 



564. HERACLEUM. i. (Cow-Parsnip.) 



Calix nearly entire. Petals emar^inately in- 

 flected, often of 2 forms. Fruit elliptic, dorsally 

 compressed, flat, apex emarginate, mari^in mem- 

 branaceous. *S'ee(/ with 3 strire, «< intervals ma- 

 culate halfway down, — 'Commissure flat, bima- 

 culate." Sprexgel. — Livolucrum none. 



Umbell and umbellet many-rayed; involucell 3 to T- 

 leaved, outer leaves longer; central flowers sometimes 

 abortive, radial ones in JI. angustifolium not differently 

 formed. 



Species. 1. 11. tanatnm. A genuine species, and 

 scarcely distinct from H. Sphondulium. 2. * Sphondylium. 

 On the banks of the river Missouri. Inner part of the 

 \oung stems eaten by the savages of Columbia river. 



Chiefly an Kuropean genus, of about 16 species. 



265. PEUCEDANUM. i. (Sulphur-wort.) 



Calix minute, 5-toothed. FctaU oblong', in- 

 curved, equal. Fruit oval, dorsally and flatly 



B 



